Valeggio sul Mincio is located very close to Garda Lake (Lago di Garda). There are numerous names of towns and villages around the lake called "by the Garda Lake" that is "del Garda" in Italian language, for example Peschiera del Garda.

Keep in mind that they often use abbrevations D.G. or DEL G. on direction signs. Just like I could easily find direction signs to Valeggio S.M. or Valeggio sul M.